Accuracy: 40 m (131 ft)

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18-Apr-2004 -- On our sailing trip from Camarque / Sardegna / Nettuno / to Messina we had several opportunities to cross confluence. Mostly it was dark (no chance for flash on open sea) or wind / waves were against us. So we were quite happy to find the 41 / 13 confluence under calm wheater and low waves.